The bioalztiviti,l of four different drugs A, B, C, D for treating a particular illness was compared in a study and the following ANOVA table was given for the data: (a) Describe a proper design of the experiment to allow valid inferences to be made from the data. (b) Use an F test to test at the 0.01 level the null hypothesis that the four treatments have the same bioactivity. Compute the p value of the observed F statistic. (c) The treatment averages are as follows: in = 66.10 (7 samples], EH 2 65.75 [8 samples], is = 62.63 [9 samples], 370 = 63.85 (6 samples}. Use the Tukev method to perform multiple comparisons of the four treatments at the 0.01 level. *(d) It turns out that A and B are brandname drugs and C and D are generic drugs. To compare bra nd . 1 _ _ 1 _ _ _ _ name versus generlc drugs, the contrast5(y'El + ya) E ( yr: + yo) Is computed. Obtaln the p value of the computed contrast and test its significance at the 0.01 level. Comment on the difference between brand-name and generic drugs